Solvated Lithium Ion Intercalation Behavior of Graphitized Carbon Nanospheres

Abstract

To prolong durability of lithium-ion batteries, stability of solid electrolyte interphase (SEI) formed at a graphite negative electrode should be improved, but the correlation of the SEI stability with the graphite structure is still unclear. This study focused on co-intercalation of dimethoxyethane (DME) into SEI-covered graphitized carbon nanosphere (GCNS) to investigate SEI degradation behavior. In situ Raman spectroscopy revealed that both ethylene carbonate (EC)-derived and propylene carbonate (PC)-derived SEIs partly passivated the DME cointercalation, but the PC-derived SEI degraded more rapidly than the EC-derived one. Additionally, the SEI at GCNS heat-treated at 2900°C had less stability than that at GCNS heat-treated at 2600°C, which is attributable to the graphite layer stacking and surface morphology.

Membranes of Multiwall Carbon Nanotubes in Chitosan–Starch with Mechanical and Compositional Properties Useful in Li-Ion Batteries

“…The greater contribution of this band to the RLi spectrum could suggest a higher graphitic character of this sample, as this band is observed as an overtone of graphitic samples, and it is not affected by defects [102]. The graphitic nature of the sample, in addition to allowing for Li ion intercalation, enhances electron transfer, promoting its use as an electrode in lithium batteries [103]. SLi may have undergone a higher degree of oxidation during Li incorporation, as indicated with the higher proportion of the D band in this sample in comparison with RLi.…”

Electrochemical In Situ/<i>operando</i> Spectroscopy and Microscopy Part 2: Battery Applications

“…A different type of graphite, graphitized carbon nanospheres (GCNSs), which are submicron-sized particle with concentric orientation of their graphene layers, was also evaluated by operando Raman spectroscopy. [58][59][60] A representative result of the GCNSs is that formation of stage-4 Li-GIC was found to be either partially or totally suppressed in the GCNSs, which could be associated with their higher contents of turbostratic graphite phase determined by their Raman spectra around 2D-band. 61 The operando Raman analyses on Li-GICs have been also applied to those on co-intercalation behaviors of solvated Li + into graphite.…”

Alkali and alkaline-earth metal ion–solvent co-intercalation reactions in nonaqueous rechargeable batteries

“…To date, the ion-solvent co-intercalation phenomenon has been extensively investigated in various nonaqueous rechargeable batteries (including LIBs, sodium-ion batteries (SIBs), potassium-ion batteries (PIBs), magnesium-ion batteries (MIBs), and calcium-ion batteries (CIBs)). [36][37][38][39][40] To the best of our knowledge, however, less attention has been paid to summarizing the ion-solvent co-intercalation reactions in rechargeable battery systems. 41 Therefore, a comprehensive summary of alkali and alkaline-earth metal ion-solvent cointercalation reactions in nonaqueous rechargeable batteries is very signicant.…”